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प्रश्न
How would you account for the following:
Actinoid contraction is greater than lanthanoid contraction.
Actinoid contraction is greater from element to element than lanthanoid contraction. Why?
उत्तर
In actinoids, 5 f-orbitals are filled. These 5 f-orbitals have a poorer shielding effect than 4 f-orbitals (in lanthanoids). Thus, the effective nuclear charge experienced by electrons in valence shells in the case of actinoids is much more than that experienced by electrons in valence shells in the case of lanthanoids. Hence, the size contraction in actinoids is greater than that in lanthanoids.
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संबंधित प्रश्न
How would you account for the following:
The chemistry of actinoids is more complicated as compared to lanthanoids.
Write on similarity between the chemistry of lanthanoids and actinoids.
With reference to structural variability and chemical reactivity, write the differences between lanthanoids and actinoids
Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.
Compare the chemistry of the actinoids with that of lanthanoids with reference to electronic configuration
Compare the chemistry of the actinoids with that of lanthanoids with reference to chemical reactivity.
Choose the most correct option.
In which of the following series all the elements are radioactive in nature?
Manganese in the +2 oxidation state is more stable than +3 oxidation state where as iron is stable at +3 oxidation state than +2 oxidation state. Explain why?
Which of the following actinoids exhibits only + 3 oxidation state?
Which of the following actinoids shows +6 oxidation state?
Actinoid series begins at ____________ and ends at ____________.
The highest oxidation state in plutonium (At. no. = 94) is ______.
The electronic configuration of Ux+ ion is [Rn]. What is the value of x?
[At. No. of U = 92]
Which of the following properties is NOT of actinoids?
Which among the following elements is radioactive?
Maximum oxidation state exhibited by Chlorine is ______.
Assertion: Actinoids form relatively less stable complexes as compared to lanthanoids.
Reason: Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding.
What is actinoid contraction?
What causes actinoid contraction?
What are actinoids? Give their general electronic configuration.
